Welcome to Australia's only Vintage Radio and Television discussion forums. You are not logged in. Please log in below, apply for an account or retrieve your password.
Australian Vintage Radio Forums
  Home  ·  About Us  ·  Discussion Forums  ·  Glossary  ·  Outside Links  ·  Policies  ·  Services Directory  ·  Safety Warnings  ·  Tutorials

Tech Talk

Forum home - Go back to Tech talk

 HOME MADE 60-70's ham receiver with pre built front end
« Back · 1 · Next »
 Return to top of page · Post #: 1 · Written at 5:12:29 PM on 28 February 2025.
Valleyvintageradio's Gravatar
 Valleyvintageradio
 Location: Steels Creek, VIC
 Member since 28 February 2025
 Member #: 2716
 Postcount: 1

Hi everyone,
I have recently come across a 17valve receiver with a prebuilt front end, 3 IF stages with 6ba6's and a crystal 2 pole filter on 450 kHz.
The Rf valves used are 6ca5's ( beam power tetrodes, good to 400 megs!) No noisy 6be6 to worry about, uses a 6eh7 as a mixer?

I have looked at geloso and eddystone circiuts with similar set ups. Definitely aus built with 1 Aegis coil former in can, also 100kHz marker and a slo-mo eddystone? dial. Has Ferguson PT174 power trans.

Does anyone have any ideas as this would be a good piece of history to get going once again.

Many thanks

Brian
 
 Return to top of page · Post #: 2 · Written at 5:45:12 PM on 28 February 2025.
MonochromeTV's avatar
 MonochromeTV
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1229

Perhaps a Radio Television and Hobbies/ Electronics Australia project?
 
 Return to top of page · Post #: 3 · Written at 6:01:02 PM on 28 February 2025.
Johnny's avatar
 Johnny
 Location: Hobart, TAS
 Member since 31 July 2016
 Member #: 1959
 Postcount: 575

Sounds like a 1963 Radio TV and Hobbies project.
"Deltahet" receiver.
Great receiver and lots of interest in its day.
Including me.
JJ
 
 Return to top of page · Post #: 4 · Written at 6:02:13 PM on 28 February 2025.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6824

Letting us know the full valve line-up would be useful.
 
 Return to top of page · Post #: 5 · Written at 3:18:08 PM on 3 March 2025.
Simplex's Gravatar
 Simplex
 Location: Bathurst, NSW
 Member since 7 August 2008
 Member #: 336
 Postcount: 400

Sounds like quite a masterful receiver and would perform well even this day and age. Good luck with your restoration.
 
 Return to top of page · Post #: 6 · Written at 9:22:10 PM on 4 March 2025.
Ian Robertson's Gravatar
 Ian Robertson
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2543

I recall that the Deltahet was based on the then-patented Barlow Wadley Loop from South Africa.

Widely copied by the Japanese with impunity due to the fact that South Africa was then a pariah state.
Hence their patent was unenforceable in the international market.

Reputed to be the best HF receiver ever, the system is also reputed to be drift-cancelling.
 
« Back · 1 · Next »
 You need to be a member to post comments on this forum.

Sign In

Username:
Password:
 Keep me logged in.
Do not tick box on a computer with public access.

Vintage Radio and Television is proudly brought to you by an era where things were built with pride and made to last.

DISCLAIMER: Valve radios and televisions contain voltages that can deliver lethal shocks. You should not attempt to work on a valve radio or other electrical appliances unless you know exactly what you are doing and have gained some experience with electronics and working around high voltages. The owner, administrators and staff of Vintage Radio & Television will accept no liability for any damage, injury or loss of life that comes as a result of your use or mis-use of information on this website. Please read our Safety Warning before using this website.

WARNING: Under no circumstances should you ever apply power to a vintage radio, television or other electrical appliance you have acquired without first having it checked and serviced by an experienced person. Also, at no time should any appliance be connected to an electricity supply if the power cord is damaged. If in doubt, do not apply power.

Shintara - Keepin' It Real · VileSilencer - Maintain The Rage